I will be doing this project to my 07 e90 Non CA key FOB. Will post the link in English.
It should look something like this Link below, but in English with detailed instructions.
Batteries and Key Fob Shell purchased from Ebay:
--Panasonic ML2020 VL2020 battery Quantity: 2 Item price $10.00
--Remote Shell fit for BMW 1 3 5 6 Series Smart Key Shell Fob 3 Button X5 X6 M5 M6
( 180900707590 )
Quantity: 2 ITEM PRICE: US $13.10
Project Saturday Aug 26th, Youtube video should be uploaded with in a weeks time.